Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.275 ·

upload_asset can now upload several files to an artifact in one call

The artifact tool's upload_asset now accepts a list of files (file_paths) instead of just one at a time

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AreaArtifactswhat it touches
KindNew Featuresin v2.1.275,
Group of 5 Use it now No documentation found

The artifact tool's upload_asset now accepts a list of files (file_paths) instead of just one at a time

What

  • upload_asset now accepts a file_paths array to upload several local files into one artifact in a single call, alongside the existing single-file file_path. A human-readable summary, like "3 files · "a.png", "b.png", 1 more", is shown for what was uploaded.
  • The artifacts tool also gained a copy_from/asset_ids action to copy assets from another artifact server-side.
  • Batch uploads via file_paths are disabled for non-interactive/scripted (SDK) callers, which must still upload one file per call.
  • If the asset store starts rate-limiting mid-batch, the remaining files in a file_paths call are held back with a specific retry message instead of the whole call failing.
  • A new error, asset_upload_pin_mismatch, is returned if an approval that covered a batch upload is retried as a single-file call, or vice versa.

Why

This makes it much faster to attach multiple images or files to one artifact, instead of needing a separate tool call and approval for each file.

Read from
Names in the bundlefile_paths

See this entry in the whole of v2.1.275 →